PDF malware analysis — malicious · 259cd30e11e11e93

MALICIOUS

PDF

6.0 KB Created: 2008-12-03 13:57:41 UTC

MD5: 3ef66dec1fbb1e78bbfa5839bbec5415 SHA-1: 92f2f2b2258d1148f636ced99b6537dd39ce260f SHA-256: 259cd30e11e11e939c2fb4ae91909b0b5b3e80e24f39f7a0649bb31ed6cf6468

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() and String.fromCharCode() for code execution. The extracted artifact 'javascript_obj0006_000.js' is also flagged as suspicious due to script obfuscation. The primary intent appears to be the execution of arbitrary code, likely to download and execute a second-stage payload.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `49155d487b4bc2154701e004f43b557150206d64f3ef2b0a7a3724f5a170909f`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB4	9808 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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